JP3828905B2 - Cell aggregation inhibitor containing a local anesthetic - Google Patents
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Description
本発明は細胞移植医療、特に、哺乳動物の皮膚繊維芽細胞等の培養細胞を被験者に注入して皮膚等の細胞欠損を修復する再生医療に用いる細胞の凝集抑制剤に関する。 The present invention relates to an agent for inhibiting cell aggregation used in cell transplantation medical treatment, particularly in regenerative medicine for repairing cell defects such as skin by injecting cultured cells such as mammalian skin fibroblasts into a subject.
事故、病気又は老化などによって失われ、又は機能が落ちた体の一部分を生体組織工学と分子細胞生物学の力によって再生させようとする医療(再生医療)が発展を遂げている。皮膚の再生医療はやけどの治療から始まったが、現在では、アンチエイジング、美白、しわや傷跡の修正などの美容医学の分野にまで及んでいる。このような再生医療を行うためには、被験者から採取した生検材料を培養培地中で実質的に免疫原性タンパク質を含まないように培養し、増殖した自己の繊維芽細胞懸濁物を皮下又は皮下組織に注入して美容的欠陥を修正する。かかる方法により、しわ、妊娠線、陥没瘢痕、非外傷性の皮膚の陥没、ならびに唇の形成不全の矯正、修復方法が報告されている(例えば、特許文献1参照)。 Medical care (regenerative medicine) has been developed that attempts to regenerate a part of a body that has been lost due to an accident, illness, aging, or the like by the power of tissue engineering and molecular cell biology. Skin regenerative medicine began with the treatment of burns, but now it extends to the field of aesthetic medicine, such as anti-aging, whitening, correction of wrinkles and scars. In order to perform such regenerative medicine, biopsy material collected from a subject is cultured in a culture medium so as to be substantially free of immunogenic protein, and the proliferated autologous fibroblast suspension is subcutaneously administered. Or injected into subcutaneous tissue to correct cosmetic defects. A method for correcting and repairing wrinkles, pregnancy lines, depressed scars, non-traumatic skin depressions, and lip dysplasia has been reported (see, for example, Patent Document 1).
被験者へ細胞を投与するためには、例えば、上記繊維芽細胞懸濁物をシリンジに満たし、27ゲージの注射針を用いて皮膚のできるだけ表面に近い部分に針を挿入し、弱く圧力をかけて皮内注射を行う。多数回または連続的に注射をしてもよい。ところで、繊維芽細胞などの非造血系培養(継代培養)細胞は、高密度の細胞懸濁液の状態のまま一定時間放置すると、細胞が互いに凝集・集合し巨大化してしまい、タンパク分解酵素等を作用させても単細胞浮遊懸濁液に再調整することは困難である。このような凝集した細胞塊は注射針による細胞の注入を困難にし、また被験者に与える苦痛を増大させるという問題点がある。 In order to administer cells to a subject, for example, the above fibroblast suspension is filled into a syringe, a 27 gauge needle is used to insert the needle as close to the surface as possible, and a weak pressure is applied. Intradermal injection is performed. Multiple or sequential injections may be made. By the way, non-hematopoietic cultured (passaging) cells such as fibroblasts, when left in a high-density cell suspension for a certain period of time, aggregate and aggregate to each other, proteolytic enzymes It is difficult to readjust the suspension into a single-cell suspension even if it is acted on. Such agglomerated cell mass has a problem in that it is difficult to inject cells with an injection needle and increases the pain given to a subject.
実際の細胞移植操作において、シングルセル(単細胞)の状態で細胞のバイアビリティー(viability;生物活性能力、生存率)を保ち、一定時間保持することは非常に重要である。すなわち、細胞移植時、細胞はシングルセルの状態でなければならず、特に注射針などを用いて細胞を移植する場合には注射針のノズル内を凝集した細胞塊は通過し得ないからである。また、一旦凝集した細胞塊を再びシングルセルに戻すには、長時間細胞塊を酵素に暴露する必要があるが、こうした長時間の酵素暴露は細胞のバイアビリティーを著しく低下させる。本発明は、かかる問題点を解決するためになされたものであって、再生医療技術などを用いて培養した細胞から調製される培養細胞懸濁液中の細胞の凝集抑制剤を提供することを課題とする。 In an actual cell transplantation operation, it is very important to maintain the viability of a cell in a single cell (single cell) state and maintain it for a certain period of time. That is, at the time of cell transplantation, the cells must be in a single cell state, and in particular when transplanting cells using an injection needle or the like, the aggregated cell mass cannot pass through the nozzle of the injection needle. . Moreover, in order to return the aggregated cell mass to the single cell again, it is necessary to expose the cell mass to the enzyme for a long time. Such long-time enzyme exposure significantly reduces the viability of the cell. The present invention has been made to solve such problems, and provides a cell aggregation inhibitor in a cultured cell suspension prepared from cells cultured using a regenerative medical technique or the like. Let it be an issue.
アミド型、エステル型などの局所麻酔薬は、膜安定化作用、神経伝達ブロック作用などにより、麻酔効果の他、抗不整脈作用もあることが知られ、長年臨床応用されている。本発明者は、この局所麻酔薬を培養細胞懸濁液に添加すると、意外にも細胞の凝集作用が顕著に低下することを見出して本発明を完成した。 Local anesthetics such as amide type and ester type are known to have anti-arrhythmic effects in addition to anesthetic effects due to membrane stabilizing action, nerve transmission blocking action, etc., and have been applied clinically for many years. The present inventor has found that when this local anesthetic is added to the cultured cell suspension, the aggregation action of the cells is unexpectedly reduced and the present invention has been completed.
すなわち、本発明の凝集抑制剤は、哺乳動物の継代された皮膚繊維芽細胞懸濁液中の細胞の凝集抑制剤として用いられるものであって、局所麻酔薬を含有する。前記局所麻酔薬は、リドカイン、メピバカイン、ジブカイン、ブピバカイン、プロピトカイン、コカイン、プロカイン、クロロプロカイン、テトラカイン及びその薬理的に許容しうる塩からなる群より選択されることを特徴とする。 That is, the aggregation inhibitor of the present invention is used as an inhibitor of cell aggregation in a subcultured dermal fibroblast suspension of a mammal , and contains a local anesthetic. The local anesthetic is lidocaine, mepivacaine, characterized dibucaine, bupivacaine, propitocaine, cocaine, procaine, chloroprocaine, to be selected from the group consisting of tetracaine, and a pharmaceutically acceptable salt thereof.
また、本発明の異なる視点において、ヒト被験者の皮下組織に注入して前記被験者の皮膚欠損を修復するための、自己の継代皮膚繊維芽細胞の懸濁物であって、上記凝集抑制剤を含有する凝集作用の抑制された継代皮膚繊維芽細胞の懸濁物が提供される。この繊維芽細胞懸濁物は、(a)被験者の皮膚の生検により得られた皮膚繊維芽細胞を、0.5〜20%の自己血清を含む培地中で継代培養し、脂肪細胞、ケラチノサイト、及び細胞外マトリクスを実質的に含まない皮膚繊維芽細胞を提供する工程、(b)継代培養した繊維芽細胞をタンパク質分解酵素に暴露して繊維芽細胞を懸濁する工程、及び(c)前記繊維芽細胞懸濁物に0.1〜5%の局所麻酔薬を添加する工程を含む方法によって製造することができる。前記局所麻酔剤はリドカイン、メピバカイン、ジブカイン、ブピバカイン、プロピトカイン、コカイン、プロカイン、クロロプロカイン、テトラカイン及びその薬理的に許容しうる塩からなる群より選択されることを特徴とする。 Further, in a different aspect of the present invention, a self-passaged skin fibroblast suspension for repairing a skin defect of the subject by injecting into the subcutaneous tissue of a human subject, the aggregation inhibitor comprising A suspension of passaged dermal fibroblasts containing the aggregating action is provided. This fibroblast suspension is obtained by subculturing (a) skin fibroblasts obtained by biopsy of a subject's skin in a medium containing 0.5-20% autoserum, Providing keratinocytes and dermal fibroblasts substantially free of extracellular matrix; (b) exposing the subcultured fibroblasts to proteolytic enzymes to suspend the fibroblasts; c) It can be produced by a method comprising a step of adding 0.1 to 5% local anesthetic to the fibroblast suspension. The local anesthetic is selected from the group consisting of lidocaine, mepivacaine, dibucaine, bupivacaine, propitocaine, cocaine, procaine, chloroprocaine, tetracaine and pharmacologically acceptable salts thereof .
本発明の細胞凝集抑制剤は、再生(細胞)医療に用いるために調製された哺乳動物の継代された皮膚繊維芽細胞懸濁液中の細胞の凝集を抑制して被験者への注入を容易にし、同時に被験者の苦痛を低減する効果を有する。さらに本発明の上記細胞凝集抑制剤は、従来より医薬品として臨床応用されてきた薬剤であるから安全性はすでに確立されており、調製された細胞懸濁物はそのままの形で安全に生体に投与することができる。
The cell aggregation inhibitor of the present invention can be easily injected into a subject by suppressing cell aggregation in a passaged dermal fibroblast suspension of a mammal prepared for use in regenerative (cell) medicine. At the same time, it has the effect of reducing the suffering of the subject. Furthermore, since the cell aggregation inhibitor of the present invention is a drug that has been clinically applied as a pharmaceutical product, safety has already been established, and the prepared cell suspension can be safely administered to a living body as it is. can do.
[細胞凝集抑制剤としての局所麻酔薬]
末梢の知覚神経線維に作用して、求心性インパルスの伝導を遮断することにより、意識や反射機能を損なわないで目的とする部分の知覚を鈍麻、又は消失させる薬剤として局所麻酔薬が知られている。局所麻酔薬は、神経線維に作用して細胞の内側からナトリウムイオンの細胞内への流入を抑制し、脱分極阻止(膜の安定化)、活動電位の発生抑制によりインパルス(興奮)の発生、伝導を抑制する。その化学構造からアミド型とエステル型に大きく2つに分けられる。アミド型としてリドカイン(キシロカイン)、メピバカイン、ジブカイン、ブピバカイン、プロピトカイン及びそれらの薬理学的に許容される塩(例えば、塩酸塩)が挙げられ、また、エステル型としてコカイン、プロカイン、クロロプロカイン、テトラカイン及びそれらの薬理学的に許容される塩(例えば、塩酸塩)が挙げられる。これらの中でも他の局所麻酔薬に比べて安全域が広く、麻酔作用及び細胞凝集抑制作用の何れもが速く、その持続時間も長いことから、リドカイン及びその薬理的に許容しうる塩が特に好ましい。種々の濃度の塩酸リドカインの注射液や外用液、ゼリー、ビスカス、及びスプレー等が、キシロカイン(商品名)としてアストラゼネカ社等から販売されている。
[Local anesthetics as cell aggregation inhibitors]
Local anesthetics are known as agents that act on peripheral sensory nerve fibers to block conduction of afferent impulses, thereby obstructing or eliminating the perception of the target part without impairing consciousness or reflex function. Yes. Local anesthetics act on nerve fibers to suppress the inflow of sodium ions from the inside of the cells, prevent depolarization (stabilization of the membrane), generate impulses (excitations) by suppressing the generation of action potentials, Suppresses conduction. From its chemical structure, it can be roughly divided into amide type and ester type. Examples of the amide form include lidocaine (xylocaine), mepivacaine, dibucaine, bupivacaine, propitocaine and pharmacologically acceptable salts thereof (for example, hydrochloride), and examples of the ester form include cocaine, procaine, chloroprocaine, and tetracaine. And pharmacologically acceptable salts thereof (for example, hydrochloride). Among these, lidocaine and pharmacologically acceptable salts thereof are particularly preferred because they have a wider safety range than other local anesthetics, both an anesthetic action and a cell aggregation inhibitory action are fast, and their duration is long. . Injection solutions, external solutions, jelly, viscos, sprays, and the like of lidocaine hydrochloride having various concentrations are sold by AstraZeneca Co., Ltd. as xylocaine (trade name).
本発明の細胞凝集抑制剤は、種々の剤型のものが使用できるが、例えば、浸潤麻酔、伝達麻酔、静脈内局所麻酔に使用される注射液が好ましい。細胞懸濁液に容易に添加し、所定の濃度となるように混合しやすいからである。これらは通常、生理食塩水に0.5〜5重量%程度のリドカイン等の局所麻酔薬を溶解したものである。本発明の細胞凝集抑制剤は培養細胞の懸濁液と任意の割合で混合して用いることができる。あるいは、遠心分離操作等によりペレット化した細胞を直接懸濁するための懸濁液として用いてもよい。従って、注射液のように滅菌された形態にあることが好ましい。これらの各種製剤は、製剤上通常用いられる緩衝剤、界面活性剤、保存剤、防腐剤、安定化剤、等張化剤などを適宜選択し、標準的な方法により製造することができる。また上記各種製剤は、医薬的に許容される担体又は添加物を共に含むものであっても良い。 The cell aggregation inhibitor of the present invention can be used in various dosage forms. For example, an injection solution used for infiltration anesthesia, transmission anesthesia, and intravenous local anesthesia is preferable. This is because it can be easily added to the cell suspension and mixed to a predetermined concentration. These are usually prepared by dissolving about 0.5 to 5% by weight of local anesthetic such as lidocaine in physiological saline. The cell aggregation inhibitor of the present invention can be used by mixing with a suspension of cultured cells at an arbitrary ratio. Alternatively, it may be used as a suspension for directly suspending cells pelleted by centrifugation or the like. Therefore, it is preferable to be in a sterilized form like an injection solution. These various preparations can be produced by standard methods by appropriately selecting buffers, surfactants, preservatives, preservatives, stabilizers, tonicity agents and the like that are usually used in the preparation. The above-mentioned various preparations may contain a pharmaceutically acceptable carrier or additive.
[細胞懸濁物の調製方法]
本発明の細胞凝集抑制剤は、培養細胞の培養液又は増殖させた細胞を酵素処理等により回収した高密度の細胞懸濁液に添加することによって凝集作用の抑制された細胞懸濁物を調製することができる。培養細胞としては、例えば、血小板等の血液細胞や、繊維芽細胞、上皮細胞、神経細胞、臓器の実質細胞及び幹細胞等の種々の培養細胞に対して用いることができるが、好ましくは通常の培養条件下で紡錘形をなしている繊維芽細胞である。皮膚の繊維芽細胞は容易に得られ増殖させることができる。皮膚繊維芽細胞培養は、例えば、被験者から採取した皮膚の3mm×5mm程度の生検材料から開始する。培養を始める前に、生検材料は、抗生物質や抗真菌剤で繰り返し洗浄する。次に、表皮及び皮下の脂肪細胞含有組織を取り、その結果得られる培養物を実質的に非繊維芽細胞を含まないようにし、真皮の試料をメス又はハサミで細切する。検体片をピンセットで組織培養フラスコの乾燥表面上に1つずつ置き、5〜10分の間付着させ、次に少量の培地を付着した組織断片をはがさないように注意しながらゆっくり加える。24時間インキュベーションした後、フラスコに追加の培地を入れる。75cm2の組織培養フラスコを使用して培養を開始する時は、培地の初期の量は3〜4mlである。生検検体からの細胞株の樹立には通常2〜3週間かかり、増殖するために、適切な時期に初期の培養容器から細胞をはがすことができる。
[Method for preparing cell suspension]
The cell aggregation inhibitor of the present invention prepares a cell suspension in which the aggregation action is suppressed by adding a culture solution of cultured cells or a proliferated cell to a high-density cell suspension recovered by enzyme treatment or the like. can do. As cultured cells, for example, blood cells such as platelets, and various cultured cells such as fibroblasts, epithelial cells, nerve cells, organ parenchymal cells and stem cells can be used. Fibroblasts that are spindle-shaped under conditions. Skin fibroblasts can be easily obtained and propagated. The dermal fibroblast culture starts with, for example, a biopsy material of about 3 mm × 5 mm of the skin collected from the subject. Before starting the culture, the biopsy is repeatedly washed with antibiotics and antifungal agents. The epidermis and subcutaneous adipocyte-containing tissue are then removed, the resulting culture is substantially free of non-fibroblasts, and the dermis sample is minced with a scalpel or scissors. Place specimen pieces one at a time on the dry surface of the tissue culture flask with forceps and allow them to adhere for 5-10 minutes, then slowly add a small amount of medium with care not to peel off the attached tissue fragments. After 24 hours of incubation, add additional media to the flask. When culturing is initiated using a 75 cm 2 tissue culture flask, the initial volume of medium is 3-4 ml. Establishment of a cell line from a biopsy specimen usually takes 2 to 3 weeks, and in order to proliferate, the cells can be detached from the initial culture container at an appropriate time.
培養の初期段階で、組織片が培養容器の底に付着していることが望ましい。付着していない組織片は新しい容器に再度植え込むべきである。当業者に公知の技術により、遺伝子組み換え技術で製造され、動物由来成分を含まないトリプシン様活性を有するセリンプロテアーゼに組織培養物を短時間暴露することにより、繊維芽細胞を刺激して増殖させることができる。セリンプロテアーゼへの暴露は非常に短い時間であるため、培養容器の壁に付着した繊維芽細胞は遊離しない。培養物が樹立されてコンフルエンスに近づいた後に直ちに、繊維芽細胞のサンプルを凍結保存のために取り出すことができる。正常なヒト繊維芽細胞の細胞培養物の継代数は制限されるため、継代数の多い繊維芽細胞より継代数の少ない繊維芽細胞を凍結保存することが好ましい。 It is desirable that the tissue piece adheres to the bottom of the culture vessel at the initial stage of culture. Non-adherent tissue pieces should be replanted into a new container. Stimulating and growing fibroblasts by briefly exposing tissue cultures to serine proteases produced by genetic recombination techniques and having no trypsin-like activity that is free of animal-derived components using techniques known to those skilled in the art Can do. Since exposure to serine protease is very short, fibroblasts attached to the walls of the culture vessel are not released. Immediately after the culture is established and approaching confluence, a sample of fibroblasts can be removed for cryopreservation. Since the number of passages in a normal human fibroblast cell culture is limited, it is preferable to cryopreserve fibroblasts with fewer passages than fibroblasts with more passages.
繊維芽細胞は、これを保存するのに適した任意の凍結培地中で凍結することができる。70容量%の増殖培地、20容量%のヒト血清(保存する細胞と同一個体由来)および10容量%のジメチルスルホキシド(DMSO)からなる培地を使用すると良好な効果が得られる。解凍した細胞を使用して二次培養を開始すると、第二の検体を得るという不便さなしに、同じ被験者で使用するための懸濁物を得ることができる。 Fibroblasts can be frozen in any freezing medium suitable for storing them. Good effects are obtained when a medium consisting of 70% by volume growth medium, 20% by volume human serum (from the same individual as the cells to be stored) and 10% by volume dimethyl sulfoxide (DMSO) is used. When secondary culture is initiated using thawed cells, a suspension for use in the same subject can be obtained without the inconvenience of obtaining a second specimen.
生検検体からの皮膚の繊維芽細胞の播種に適した任意の組織培養法を、本発明を実施するために、細胞の増殖に使用することができる。当業者に公知の技術は、R.I.Freshney編、ANIMAL CELL CULTURE: A PRACTICAL APPROACH(IRL Press,Oxford England,1986)およびR.I.Freshney編、CULTURE OF ANIMAL CELLS: A MANUAL OF BASIC TECHNIQUES,Alan R.Liss & Co.,New York,1987)に記載されており、これらは参考文献として本明細書に組み込まれる。 Any tissue culture method suitable for seeding skin fibroblasts from a biopsy specimen can be used for cell growth to practice the present invention. Techniques known to those skilled in the art are described in R.I. Freshney, ANIMAL CELL CULTURE: A PRACTICAL APPROACH (IRL Press, Oxford England, 1986) and R.I. Freshney, CULTURE OF ANIMAL CELLS: A MANUAL OF BASIC TECHNIQUES, Alan R. Liss & Co., New York, 1987), which are incorporated herein by reference.
この培地は初代繊維芽細胞培養物の増殖に適した任意の培地である。多くの例で、この培地には0.5%〜20%(v/v)の血清を添加し、繊維芽細胞の増殖を促進する。高濃度の血清は、繊維芽細胞のより速い増殖を促す。好適な実施態様において、血清はヒト血清(保存する細胞と同一個体由来)であり、これは培地の10%の最終濃度になるよう加える。培地は、例えば、2mMグルタミン、110mg/Lのピルビン酸ナトリウム、10%(v/v)のヒト自己血清(保存する細胞と同一個体由来)および抗生物質を添加した、高グルコースDMEM(「完全培地」)である。細胞はセリンプロテアーゼ処理により新しいフラスコに継代される。増殖のため、各フラスコに1/3を分けて入れる。三底T−150フラスコ(総培養面積450cm2)が、本発明の実施に適している。三底T−150(総培養面積450cm2)は、約6×106個の細胞を接種して、約1.8×107個の細胞を産生する能力を有する。 This medium is any medium suitable for growth of primary fibroblast cultures. In many instances, 0.5% to 20% (v / v) serum is added to the medium to promote fibroblast proliferation. High concentrations of serum promote faster proliferation of fibroblasts. In a preferred embodiment, the serum is human serum (from the same individual as the cells to be stored), which is added to a final concentration of 10% of the medium. The medium is, for example, high glucose DMEM (“complete medium” supplemented with 2 mM glutamine, 110 mg / L sodium pyruvate, 10% (v / v) human autoserum (from the same individual as the cells to be stored) and antibiotics. ]). Cells are passaged into new flasks by serine protease treatment. Add 1/3 aliquots to each flask for growth. A three-bottom T-150 flask (total culture area 450 cm < 2 >) is suitable for the practice of the present invention. Three-bottom T-150 (total culture area 450 cm 2 ) has the ability to inoculate about 6 × 10 6 cells and produce about 1.8 × 10 7 cells.
インキュベーションの最後に、細胞をセリンプロテアーゼによって組織培養フラスコからはがし、遠心分離でペレット化したものを生理食塩水に再懸濁してさらに充分に洗浄し、注入のために等量の0.2〜10重量%、好ましくは1〜5重量%、最も好ましくは約2重量%キシロカイン注射液で懸濁する。容量いっぱいに増殖させた三底T−150フラスコからは、約107個の細胞が産生され、これは約0.3mlの懸濁物を作製するのに充分である。 At the end of the incubation, the cells are detached from the tissue culture flask with serine protease, the pelleted by centrifugation is resuspended in physiological saline and further thoroughly washed, and an equal volume of 0.2-10 for injection. Suspend in a wt%, preferably 1-5 wt%, most preferably about 2 wt% xylocaine injection. Is a three-base T-0.99 flasks, grown to full capacity, about 10 7 cells are produced, which is sufficient to produce a suspension of about 0.3 ml.
[被験者への細胞懸濁物の投与]
本発明の細胞懸濁物は通常の外科的手法により被験者の体内、特に顔へ注入することができる。具体的には、注入希望部位に、所望により局所麻酔薬含有テープ(例えば、ペンレス(商品名))を貼って15分程度放置する。急ぎの場合はこの過程は省略可能である。次に、上述した方法により調製した細胞懸濁物を、例えば、27ゲージの注射針を付けたシリンジで皮下に注入する。注入量の目安としては、1ml(3×107個の細胞)はおよそ皮膚表面積の6〜10cm2に注入可能な量である。具体的には、片側下眼瞼全体で約0.3ml〜0.6ml使用する。
[Administration of cell suspension to subject]
The cell suspension of the present invention can be injected into the subject's body, particularly the face, by conventional surgical techniques. Specifically, if desired, a local anesthetic-containing tape (for example, penless (trade name)) is attached to the desired injection site and left for about 15 minutes. If you are in a hurry, this process can be omitted. Next, the cell suspension prepared by the above-described method is injected subcutaneously, for example, with a syringe equipped with a 27 gauge injection needle. As a guide for the amount to be injected, 1 ml (3 × 10 7 cells) is an amount that can be injected into about 6 to 10 cm 2 of the skin surface area. Specifically, about 0.3 ml to 0.6 ml is used for the entire unilateral lower eyelid.
本発明は以下の実施例により、さらに具体的に説明されるが、これらは本発明の範囲を限定するものではなく、機能的に均等な方法及び成分は本発明の範囲に含まれる。 The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention, and functionally equivalent methods and ingredients are included within the scope of the invention.
通常の方法で培養したヒト真皮繊維芽細胞を、酵素(トリプシンEDTA)を用いて回収し以下の実験に使用した。ヒト真皮繊維芽細胞と(1)生理食塩水、(2)牛胎児血清(FCS)を添加したDMEM培地、又は(3)キシロカイン(1重量%)を添加した生理食塩水とを用い細胞浮遊液を作製した。各細胞浮遊液は、室温(約26℃)、又は冷蔵(4℃)にて静置し、培養細胞の生物活性の変化、細胞の凝集状態の変化を経時的(15分、30分、1時間、2時間、4時間、6時間、8時間及び12時間)に観察した。 Human dermal fibroblasts cultured by a normal method were collected using an enzyme (trypsin EDTA) and used for the following experiments. Cell suspension using human dermal fibroblasts and (1) physiological saline, (2) DMEM medium supplemented with fetal calf serum (FCS), or (3) physiological saline supplemented with xylocaine (1% by weight) Was made. Each cell suspension is allowed to stand at room temperature (about 26 ° C.) or refrigerated (4 ° C.), and changes in biological activity of cultured cells and changes in the aggregation state of cells over time (15 minutes, 30 minutes, 1 2 hours, 4 hours, 6 hours, 8 hours and 12 hours).
その結果を以下の表1〜4、及び図1及び2に示す。表1は、室温で保存したときの培養細胞浮遊液の凝集、集合状態を倒立顕微鏡で観察した結果をまとめたものである。表中、+は細胞の凝集の度合いを示したもので+の数が多いほど激しく凝集することを表わす。一方、−はほとんど細胞が凝集せずにシングルセルとして浮遊している状態を示す。なお、表中、生理食塩水に浮遊させた細胞の60分後の状態(+++)を倒立顕微鏡(100倍)で観察した結果を図1に、また、キシロカイン添加生理食塩水に浮遊させた細胞の60分後の状態(−)を倒立顕微鏡(100倍)で観察した結果を図2にそれぞれ示した。図1及び2に示したように、生理食塩水に浮遊させた細胞は明らかに凝集が起こる(図1)のに対し、キシロカイン添加生理食塩水ではほとんど凝集が起こっていない(図2)ことが分かる。 The results are shown in the following Tables 1 to 4 and FIGS. Table 1 summarizes the results of observation of the aggregated and aggregated state of the cultured cell suspension when stored at room temperature with an inverted microscope. In the table, + indicates the degree of cell aggregation, and the greater the number of +, the more intense the aggregation. On the other hand,-indicates a state in which the cells are almost not aggregated and are floating as a single cell. In the table, the result of observing the state (++++) after 60 minutes of the cells suspended in physiological saline with an inverted microscope (100 times) is shown in FIG. 1, and the cells suspended in physiological saline supplemented with xylocaine The results of observation of the state (-) after 60 minutes with an inverted microscope (100 times) are shown in FIG. As shown in FIGS. 1 and 2, the cells suspended in the physiological saline clearly aggregated (FIG. 1), while the xylocaine-added physiological saline hardly aggregated (FIG. 2). I understand.
次に、各細胞浮遊液を冷蔵保存(4℃)したときの結果を表2にまとめた。室温に比べて凝集は起こりにくくなるが、キシロカインを添加した場合と添加しなかった場合とでは明らかに差が認められた。 Next, Table 2 summarizes the results when each cell suspension was stored in a refrigerator (4 ° C.). Aggregation is less likely to occur than at room temperature, but a clear difference was observed between when xylocaine was added and when it was not added.
続いて、上記室温及び冷蔵のそれぞれの条件で保存した場合の細胞の生物活性保持状態をトリパンブルー染色法にて調べた。すなわち、細胞懸濁液0.05〜0.1mlに対し等量のトリパンブルーを添加し、約1分間放置した後、顕微鏡で検査を行った。単位体積(1×10−4ml)あたりの染色細胞と非染色細胞の比からバイアビリティー(生存率)を計算した。生存している細胞は細胞膜が機能しているために細胞質は染色されないが、死滅した細胞では細胞膜が機能しないために細胞質に色素(トリパンブルー)が入り込み染色される。そこで、次式により細胞のバイアビィティーを計算した。
(非染色細胞数/全体の細胞数)×100
Subsequently, the biological activity retention state of the cells when stored under the above conditions of room temperature and refrigeration was examined by trypan blue staining. That is, an equal amount of trypan blue was added to 0.05 to 0.1 ml of the cell suspension, left for about 1 minute, and then examined with a microscope. Viability (viability) was calculated from the ratio of stained and unstained cells per unit volume (1 × 10 −4 ml). The surviving cells do not stain the cytoplasm because the cell membrane functions, but the dead cells do not function because the cell membrane does not function, and the dye (trypan blue) enters the cytoplasm and is stained. Therefore, the cell viability was calculated by the following equation.
(Number of unstained cells / total number of cells) × 100
その結果を以下の表3及び4に示す。室温で720分保存した場合、バイアビィティーは約90%とやや低下するが、それ以外の条件下では95%以上のバイアビリティーがあることが分かった。 The results are shown in Tables 3 and 4 below. When stored at room temperature for 720 minutes, the viability decreased slightly to about 90%, but it was found that there was a viability of 95% or more under other conditions.
Claims (6)
(b)継代培養した繊維芽細胞をタンパク質分解酵素に暴露して繊維芽細胞を懸濁する工程、及び
(c)前記繊維芽細胞懸濁物に0.1〜5重量%の局所麻酔薬を添加する工程
を含み、前記局所麻酔剤がリドカイン、メピバカイン、ジブカイン、ブピバカイン、プロピトカイン、コカイン、プロカイン、クロロプロカイン、テトラカイン及びその薬理的に許容しうる塩からなる群より選択されることを特徴とする凝集作用の抑制された継代皮膚繊維芽細胞懸濁物の製造方法。 (A) Skin fibroblasts obtained by biopsy of a subject's skin are subcultured in a medium containing 0.5 to 20% by volume of autoserum to substantially contain fat cells, keratinocytes, and extracellular matrix. Providing dermal fibroblasts free of
(B) exposing the subcultured fibroblasts to proteolytic enzymes to suspend the fibroblasts; and (c) 0.1 to 5% by weight of a local anesthetic in the fibroblast suspension. look including the step of adding, the local anesthetic agent is lidocaine, mepivacaine, dibucaine, bupivacaine, propitocaine, cocaine, procaine, chloroprocaine, to be selected from the group consisting of tetracaine, and a pharmaceutically acceptable salt thereof A method for producing a suspension of subcultured skin fibroblasts with suppressed aggregation action.
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